/**
 * map 是k-v
 */
void main(){

  var user={
    'name':'sushi',
    'age':34,
    'addpr':'四川',
  };

  var info =new Map();
  info.addAll({'name':'sushi'});
  info['id']=34;
  print(info.length);

  for(var y in info.values){
    print(y);
  }
  for(var x in info.keys){
    print(x);
  }

  info.forEach((k,v){
    print(k);
    print(v);
  });

  for(var entry in info.entries){
    print(entry.key);
    print(entry.value);
  }
}